<template>
	<view>
	<view class="search-box">
    <uni-search-bar @confirm="search" @input="input" cancelButton="none" :radius="100"></uni-search-bar>
  </view>
  <!-- 搜索建议 -->
  <view class="sugg-list" v-if="searchList.length!==0">
    <view class="sugg-item" v-for="(item,i) in searchList" :key="i" @click="gotoDetail(item)">
      <view class="goods-name">{{item.goods_name}}</view>
      <uni-icons type="arrow-right" size="16"></uni-icons>
    </view>
  </view>
  
  <!-- 搜索历史 -->
  <view class="history-box" v-else>
    <!-- 搜索标题 -->
    <view class="history-title">
      <text>搜索历史</text>
      <uni-icons type="trash" size="17" @click="cleanhistory"></uni-icons>
    </view>
    <!-- 搜索列表 -->
    <view class="history-list">
      <uni-tag :text="item" v-for="(item,i) in histories" :key="i" @click="gotogoodList(item)"></uni-tag>
    </view>
  </view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				// 延时器timerId
        timer:null,
        // 关键词
        kw:'',
        // 搜索的结果列表
        searchList:[],
        // 搜索关键词历史记录
        historyList:[]
        
			};
		},
    onLoad() {
      this.historyList=JSON.parse(uni.getStorageSync('kw')||[])
    },
    methods:{
      input(e){
        clearTimeout(this.timer)
        this.timer= setTimeout(()=>{
        this.kw=e.value
        this.getsearchList()
      },500)
      },
    async  getsearchList(){
        // 判断搜索的关键词是否为空
        if(this.kw.length===0){
          this.searchList=[]
          return
        }
      const {data:res} = await uni.$http.get('/api/public/v1/goods/qsearch',{query:this.kw})
      if(res.meta.status!==200) return uni.$showMsg()
      this.searchList=res.message
      
      this.savehistoryList()
      },
      gotoDetail(item){
       uni.navigateTo({
         url:'/subpkg/goods_detail/goods_detail?goods_id='+item.goods_id
       })
      }, 
     // 存储关键词的方法
      savehistoryList(){
        // this.historyList.push(this.kw)
        const set = new Set(this.historyList)
        set.delete(this.kw)
        set.add(this.kw)
        this.historyList=Array.from(set)
        // console.log(set)
        // 将搜索历史记录进行持久化处理
        uni.setStorageSync('kw',JSON.stringify(this.historyList))
      },
      // 请空搜索历史记录
      cleanhistory(){
        // 清空data中history中的数据
        this.historyList=[],
        // 清空本地储存中的历史记录
        uni.setStorageSync('kw','[]')
      },
      // 点击历史记录跳转到goodList页面事件
      gotogoodList(kw){
        uni.navigateTo({
          url:'/subpkg/good_list/good_list?query='+kw
        })
      }
    },
    computed:{
      histories(){
        return [...this.historyList].reverse()
      }
    }
	}
</script>

<style lang="scss">
.search-box{
  position: sticky;
  top: 0;
  z-index: 999;
}
.sugg-list{
  padding: 0 5px;
  .sugg-item{
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #efefef;
    .goods-name{
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      margin-right: 3px;
    }
  }
}
.history-box{
  padding: 0 5px;
  .history-title{
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    height: 40px;
    align-items: center;
    
  }
  .history-list{
    display: flex;
    flex-wrap: warp;
    uni-tag{
      margin-top: 5px;
      margin-right: 5px;
    }
  }
}
</style>
